problem after migrating cakephp 1.2 to 1.3.2

I upgrade cakephp 1.2 to 1.3.2 and I am having Notice (8): Unde开发者_开发百科fined variable: url [APP/webroot/index.php, line 88]. does anybody know how can I sort it out? Thanks

Have you followed the guide for migrating from CakePHP 1.2 to 1.3? One of the first things it says is to replace APP/webroot/index.php with the new version due to changes.